The Classic was the same…. And no, there were no specific numbers back then. Partly because exactly what constitutes “excess data” will vary wildly with what else is displayed - a complex routing with lots of airports around might have excess data if you select airports, a simple route might be okay till you select waypoints too. The Classic would often show it if you had a range in excess of 80 miles selected and asked for it to show waypoints, for example. No idea what the max considers “excess data”, but it’s a moot point anyway as I’d file “what exact combination of things may cause “excess data” to be displayed” to be so far down the list of minutiae as to be completely useless.